Tool-holder for machines for cutting valve-disks.



No. 738,854. PATENTBD SEPT. 15, 1903.

EL. SMITH. TOOL HOLDER FOR MACHINES FOR CUTTING VALVE DISKS.

APBLIOATION FILED JULY 21- 1902'.

N0 MODEL.

UNITED. STATES Patented September 15, 1903. 7

PATENT OFFICE.

FRANK L. SMITH, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO ALVA C.RICKSECKER, OF CHICAGO, ILLINOIS.

TOOL-HOLDER FOR MACHINES FOR CUTTING VALVE-DISKS.

SPECIFICATION forming part of Letters Patent No. 738,854, datedSeptember 15, 11903.

Application filed July 21,1902. Serial No. 116,325. (No model.)

To all whom it ntay concern.-

Be it known that I, FRANK L. SMITH, a citizen of the United States, anda resident of Chicago, Illinois, have invented certain new and usefulImprovements in Tool-Holders for tion with my machine for cutting globeand gate valves and valve-seats, for which I ob tained Letters PatentNo. 682,368, dated September 10, 1901.

It consists in the features of construction set out in the claims.

In the drawings, Figure 1 is a perspective, view of my valve-cuttingapparatus provided with my improved tool-holder. Fig. 2 is a detail sideelevation of the tool-holder.

3 is a detail axial section. Fig. 4 is a transverse sectionat the'line 44: on Fig. 2. Fig. 5 is a plan view of the tool and holder. Fig.

6 is a plan view of the tool-holder, the tool being removed.

The bracket or standard 1 is designed to be mounted in any securemanner, and I have shown the entire machine of which said standard maybe a part because so far as the use of my present improvement isconcerned it is not necessary that the remainder of the m a chine bepresent. The bracket plate 2, in which the chuck for holding the valveor disk to be cut is to be mounted, is bolted to the bracket 1, as seenin the drawings, and the collar or sleeve 3, which constitutes theexterior element of the adjustable bearing for the shaft or stem 4 ofchuck,is screwed into said bracketplate. The construction of thischuck-bearing and its capacity for adjustment are fully set out in mysaid patent of September 10, 1901, and I have not undertaken toillustrate the same in the drawings of this application. For the purposeof the present invention it is not material whether the chuck has theadjustment shown in said patent, and I have shown it, therefore,adjusted with its axis at right angles to the bracket-plate 2. It will-be understood that by means of the crankhandle 5 the chuck and thevalve or other part to becut may be rotated.

The tool-holder is designed to be mounted upon the upper side of thebracket 1, a suitable channeled seat 6 being provided for it in thatposition.

The tool-holder comprises the bracket 7, which is adapted to be mountedin the channel-seat 6 and screwed rigidly, with the toolholding partsoverhanging as far as may be necessaryto reach thework within the limitsof adjustment aiforded by the length of the seat and the bracketbase andthe slot 9 in the lat ter, through which the clamping-bolt 10 takes tobind the bracket to this seat. The bracket comprises two parallel-facedears 11 and is split in the plane between the cars from the forward endof the slot 9 to the forward end of the bracket, and the clamping-bolt12, set through the two parts of the bracket, which is then renderedbifurcated, is adapted to draw the two cars toward each other. Betweenthe ears there is mounted a block 15, pivoted on trunnions 16 16,whichare set through the ears 11. The block is adapted to fit closely betweenthe ears, so that a very slight tightening of the clamp-screw 12 bindsthe block tightly. Through the block, in line transverse to the actionof the trunnions and in plane parallel with the face of the ears, thereis formed a cylindrical aperture in which is lodged and adapted both torotate and reciprocate the tool-holder barrel or sleeve 17. Journaled inthe upper or rear end of the sleeve is the feed-screw 18, stoppedagainst longitudinal movement by the shoulder 19 and the hub of theoperating-handle 20. l/Vithin the barrel, fitting closely therein, isthe tool-stock 21, axially apertured and inte riorly threaded forengagement of the feedscrew 18, so that the rotation of the latter whenthe tool-stock is prevented from rotating causes said tool-stock to beactuated longitudinally in the barrel. The tool-stockhas near its outeror lower end an aperture mum range of travel which the cutter isdesigned t'o have in doing its work. The cutter may be bound tightly inthe stock by means of the screw 26, set through the end of the stock andimpinging against the side of the cutter, forcing it back against theupper sideof its aperture in the stock. This mode of securing the cutterwill be employed when it is desired to cut aplain face, whether conical,cylindrical, or fiat. For the purpose of adapting the tool to cut acrowning or concave face the screw 26 will be left slack, and the cutterwill be held in place in the stock by means of pin 27, set through thestock and the cutter, the apertures 28 in the stock being elongatedtransversely with respect thereto, so that the cutter can travel in itsseat transversely to the axis of its travel with the stock in thebarrel, and to cause such transverse travel at proper rate and in properdirection to produce a curved seat, whether convex or concave, I providein opposite sides of the barrel the slots 29 29, which are curved in thearc of a circle whose radius is that of the maximum disk for which aparticular tool is adapted. For example, for a tool adapted to cut avalve up to four inches in diameter the slot 29 will be curved with atwoinch radius. The pin 27 enters the elongated slot at one side of thetool-stock, and the aperture in the cutter by being inserted through oneof the curved slots 29 and is arranged to come tight by a slight taperin the cutter near the end, protrudes through the other curved slot, theends of the pin being arranged so as not to protrude beyond thecylindrical surface of the barrel when it is thus tight in the cutter.By this construction it will be noticed that the form of the slotcontrolling the pin causes the pin to control the movement of the cuttertransverse to the barrel and causes its cutting-point to traverse acurve corresponding to that of the curved slots 29, while it is advancedin the direction of the axis of the barrel by the action of thefeedscrew.

The cars 11 11 are curved in the arc of a circle about the clamp-screwand graduated, as seen at 30, to indicate the angle of deflection, ifany, of the axis of the barrel 17 from vertical position, an index orreading point 31 being pivoted on the similarly-curved periphery of theblock 15. The point at which the axis of the barrel is vertical, so thatthe tool by being fed longitudinally will cut a plain face, is marked 0,and the scale is graduated both ways from that point, all desirable orcommon angles of work being marked. The bracket 7 and the block 15 areformed so as to permit a range of angular adjustment of the block in thebracket from the position at which the axis of the sleeve or barrel isinclined forty-five degrees inward-that is,back toward the standard 1toa position at which the barrel extends horizontally, with the endcarrying the tool projecting forward. This adapts the device to cut anyface, either flat,

concave, or convex, within a range of one hundred and thirty-fivedegrees, for it will be noticed that by rollingthe barrel in the blockthe slots 29 may be made to stand either convex or concave to the facewhich is operated upon by the tool, and thereby said face may be giveneither curvature. In order to cause the tool at all times toproject, asit should, radially with respect to the axis of the sleeve, I provideupon the surface of the latter at oppositesides longitudinal slots 17 a17, and pivoted in a lug 32 on the upper side of the block 15 isalatch33, which is adapted to be thrown down rearward into engagementwith the slot 17, thus locating the sleeve in correct position before itis secured by the clampingbolt 12.

It will be understood that the cutter may be secured in the tool-stockwith its cutting end protruding in either direction, as required toreach the face to be out.

In order that the sleeve may be clamped firmly in the block, so as notto move longitudinally nor rotate therein during the work,

I slot the block through at the rear side, making it an open ring, theslot being in the foreand-aft plane in which the bracket is bifurcated,so that the clamping-bolt which causes the bracket to bind the blocktightly between the ears also causes the block to bind the sleeve firmlyin position.

I claim- 1. In a machine of the character described, in combination withthe rotatable workholder, a tool-holder comprising a bracket mounted onthe work-holder bearings; a block pivoted in such bracket, with capacityfor angular adjustment in a plane radial to the work-holder axis; meansfor securing it in adjusted position; a sleeve which penetrates theblock in a direction at right angles to-its pivotal axis, and isrotatable and longitudinally movable in the block; the cutter, and thetool-stock carrying the same mounted in the sleeve and provided withmeans for moving it longitudinally therein to carry the cutter along theface of the work.

2. In a machine of the character described, in combination with therotatable workholder, a tool-holder comprising a bracket mounted on thework-holder bearings; a block pivoted in such bracket with capacity forangular adjustment in a plane radial to the work-holder axis; means forsecuring it in adjusted position; a sleeve which penetrates the block ina direction at right angles toits pivotal axis, and is rotatable andlongitudinally movable in the block; the cutter, and the tool-stockcarrying the same mounted in the sleeve and provided withmeans formoving it longitudinally therein to carry the cutter along the face ofthe work, the sleeve having a curved slot and the tool-stock having theaperture in which the cutter is mounted,

elongated transversely with respect to the whereby the cutter is movedlongitudinally in direction transverse to the axis, as the stock ismoved longitudinally in the sleeve.

In a machine of the character described, in combination with therotatable workholder, a tool-holder comprising a bracket mounted on thework-holder bearings, said bracket being bifurcated in a plane radial tothe work-holder axis forming ears adapted to be clamped toward eachother; a bolt for clamping them; a block pivoted in the bracket betweenthe ears and adapted to be held by clamping the ears together, saidblock having capacity for angular adj ustment about its pivot betweensaid ears, said block and ears having on one part a graduated angularscale and on the other part an index or read ing point traversing suchscale as the block is adjusted about its pivot; and means mounted in theblock for carrying the tool and advancing and retracting it in the planein which the block has its angular adjustment.

4. In a machine of the character described, in combination with therotatable workholder, a tool-holder comprising a bracket mou nted on thework-holder bearings; a block pivoted in such bracket with capacity forangular adjustment in a plane radial to the work-holder axis, and meansfor securing it in adjusted position; devices carried by said block forcarrying the tool and for advancing and retracting it with respect tothe pivotal axis of the block.

5. In a machine of the character described, in combination with therotatable workholder, a tool-holder comprising a bracket mounted on thework-holder bearings, a block pivot-ed in such bracket, with capacityfor angular adjustment in a plane radial to the work-holder axis, andmeans for securing it in adjusted position; means carried by said blockfor carrying the tool and for advancing and retracting it with respectto the pivotal axis of the block, said means comprising a tool-stock atool carried thereby, with capacity for adjustment transversely withrespect to said advancing and retracting movement, and a cam devicewhich operates to guide the tool in said transverse direction as it iscarried bodily back and forward in said advancing and retractingmovement.

6. In a machine of the character described, in combination with therotatable workholder, a tool-hol ler comprising a bracket mo unted onthe workh older bearings; a block pivoted to such bracket, with capacityfor angular adjustment in a plane radial to the work holder axis;devices carried by said block for carrying the tool and for advancingand retracting it with respect to the pivotal axis of the block, theblock and the bracket having corresponding and laterally contiguousdisks or lugs curved about the axis of their pivotal connection, one ofsaid. contignous parts having a graduated angular scale, and the otherpart an index or reading point traversing such scale as the block isadjusted about the pivot, and means for securing it in adjustedposition.

7. In a machine of the character described, in combination with arotatable workholder, a tool-holder comprising a bracket mounted 011 thework-holder bearing; a block pivoted to such bracket with capacity forangular adjustment in a plane radial to the work-holder axis; means forsecuring it in adjusted position; devices mounted on such block forcarrying the tool, adapted to be rotated in the block about an axis in aplane at right angles to the axis of the block, and comprising means foradvancing and retracting the tool with respect to the pivotal axis ofthe. block.

8. In a machine 01": the character described, in combination with therotatable work-. holder, a tool-holder comprising a bracket mounted onthe work-holder bearings; a block .pivoted in such bracket with capacityfor angular adjustment in a plane radial to the work-holder axis, andmeans for securing it in adjusted position; a sleeve which penetratesthe block in a direction at right angles to its pivotal axis, saidsleeve being rotatable and longitudinally movable in the block; thecutter and the tool-stock carrying the same mounted in the sleeve andprovided with means for moving it longitudinally therein to carrythe-cutter along the face of the Work, the sleeve having longitudinalgrooves at opposite sides in the plane in which the cutter projects fromthe stock; and a latch mounted on the block adapted to be engaged witheither of the grooves to retain the sleeve, as to rotation about itsaxis with the cutter, in the proper radial plane.

9. In a machine of the character described, in combination with therotatable workholder, a tool-holder comprising a bracket mounted on thework-holder bearings, bifurcated and provided with a clamping-bolt; ablock pivoted in the bracket between the parts separated by thebifurcation, and adapted thereby to be clamped by the bolt, the blockbeing apertured and slotted fore and aft, and a tool-carrying sleevepenetrating the block at said aperture, movable longitudinally androtatable therein, and adapted to be clamped in the block by the boltwhen the block is clamped in the bracket.

In testimony whereof I have hereunto set my hand, at Chicago, Illinois,this 7th day of July, 1902.

FRANK L. SMIIII.

'Witnesses:

CHAS. S. BURTON, EDGAR Ii. JoNA 'r.

ICC

